darktable-org
Denoise (and similar graphs)
Maybe I'm misusing this feature but I have had circumstances where I was trying to recover a deeply flawed image as best I could; one where I'm trying to recover a photo where I accidentally set ISO to max.
It turned out the denoise flat profile was fine but the whole line needed to be moved up. It would be good to have a modifier key for the whole line (eg shift+drag) or pre-point-selector (eg Ctrl+click) or global selector (eg Ctrl+A) so all the points can be moved in unison
And if you want to adjust the strength at all scales equally, you can just adjust the "strength" slider - all of the nodes on the graph get multiplied by that setting internally.
The actual calculation is that the profiling process (done before darktable is compiled) computes a camera-specific base strength for each wavelet scale. The base strengths are then multiplied by the corresponding value in the graph and the global strength set with the strength slider.
Thanks for the clarifications. Clearly there's capability.
I see you've made it feature:exists but suggestion below is for consideration of improved usability
As a UX/UI designer it does make me wonder whether there are some UI tweaks that may make this and similar graphs more intuitive - not suggesting dumbing down but perhaps reflect on the graph, the effect of the 'strength' slider, as another line or area.
Also wondered whether the more common case is a/ moving the whole line, or b/ a more targeted usage at specific noise granularities (current emphasis). Is there any science around high ISO/RAW noise that points to where the emphasis should be- ie is it uniform or is there a more complex profile. If noise is generally uniform, then moving the whole line seems more natural, and it might be better to change the influence circle value to max, rather than min. Then users who require more specificity still can just mouse-wheel back to more constrained influence.